diff --git a/library/src/main/java/eu/kanade/tachiyomi/animesource/model/SAnime.kt b/library/src/main/java/eu/kanade/tachiyomi/animesource/model/SAnime.kt
index 5bb236d..21226a8 100644
--- a/library/src/main/java/eu/kanade/tachiyomi/animesource/model/SAnime.kt
+++ b/library/src/main/java/eu/kanade/tachiyomi/animesource/model/SAnime.kt
@@ -18,6 +18,8 @@ interface SAnime {
 
     var thumbnail_url: String?
 
+    var update_strategy: UpdateStrategy
+
     var initialized: Boolean
 
     companion object {
diff --git a/library/src/main/java/eu/kanade/tachiyomi/animesource/model/UpdateStrategy.kt b/library/src/main/java/eu/kanade/tachiyomi/animesource/model/UpdateStrategy.kt
new file mode 100644
index 0000000..1000ea4
--- /dev/null
+++ b/library/src/main/java/eu/kanade/tachiyomi/animesource/model/UpdateStrategy.kt
@@ -0,0 +1,6 @@
+package eu.kanade.tachiyomi.animesource.model
+
+enum class UpdateStrategy {
+    ALWAYS_UPDATE,
+    ONLY_FETCH_ONCE
+}
diff --git a/library/src/main/java/eu/kanade/tachiyomi/animesource/online/AnimeHttpSource.kt b/library/src/main/java/eu/kanade/tachiyomi/animesource/online/AnimeHttpSource.kt
index 401a590..0972802 100644
--- a/library/src/main/java/eu/kanade/tachiyomi/animesource/online/AnimeHttpSource.kt
+++ b/library/src/main/java/eu/kanade/tachiyomi/animesource/online/AnimeHttpSource.kt
@@ -3,7 +3,6 @@ package eu.kanade.tachiyomi.animesource.online
 import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.animesource.AnimeCatalogueSource
 import eu.kanade.tachiyomi.animesource.model.*
-import eu.kanade.tachiyomi.network.GET
 import okhttp3.Headers
 import okhttp3.OkHttpClient
 import okhttp3.Request
@@ -270,6 +269,29 @@ abstract class AnimeHttpSource : AnimeCatalogueSource {
         throw Exception("Stub!")
     }
 
+
+    /**
+     * Returns the url of the provided anime
+     *
+     * @since extensions-lib 14
+     * @param anime the anime
+     * @return url of the anime
+     */
+    open fun getAnimeUrl(anime: SAnime): String {
+        throw Exception("Stub!")
+    }
+
+    /**
+     * Returns the url of the provided episode
+     *
+     * @since extensions-lib 14
+     * @param episode the episode
+     * @return url of the episode
+     */
+    open fun getEpisodeUrl(episode: SEpisode): String {
+        throw Exception("Stub!")
+    }
+
     /**
      * Called before inserting a new episode into database. Use it if you need to override episode
      * fields, like the title or the episode number. Do not change anything to [anime].
@@ -277,8 +299,7 @@ abstract class AnimeHttpSource : AnimeCatalogueSource {
      * @param episode the episode to be added.
      * @param anime the anime of the episode.
      */
-    open fun prepareNewEpisode(episode: SEpisode, anime: SAnime) {
-    }
+    open fun prepareNewEpisode(episode: SEpisode, anime: SAnime) {}
 
     /**
      * Returns the list of filters for the source.
diff --git a/library/src/main/java/eu/kanade/tachiyomi/network/JavaScriptEngine.kt b/library/src/main/java/eu/kanade/tachiyomi/network/JavaScriptEngine.kt
new file mode 100644
index 0000000..3d29e78
--- /dev/null
+++ b/library/src/main/java/eu/kanade/tachiyomi/network/JavaScriptEngine.kt
@@ -0,0 +1,19 @@
+package eu.kanade.tachiyomi.network
+
+import android.content.Context
+
+/**
+ * Util for evaluating JavaScript in sources.
+ */
+class JavaScriptEngine(context: Context) {
+
+    /**
+     * Evaluate arbitrary JavaScript code and get the result as a primtive type
+     * (e.g., String, Int).
+     *
+     * @since extensions-lib 14
+     * @param script JavaScript to execute.
+     * @return Result of JavaScript code as a primitive type.
+     */
+    suspend fun <T> evaluate(script: String): T = throw Exception("Stub!")
+}
diff --git a/library/src/main/java/eu/kanade/tachiyomi/network/Requests.kt b/library/src/main/java/eu/kanade/tachiyomi/network/Requests.kt
index 642540e..27d19bd 100644
--- a/library/src/main/java/eu/kanade/tachiyomi/network/Requests.kt
+++ b/library/src/main/java/eu/kanade/tachiyomi/network/Requests.kt
@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.network
 
 import okhttp3.CacheControl
 import okhttp3.Headers
+import okhttp3.HttpUrl
 import okhttp3.Request
 import okhttp3.RequestBody
 
@@ -16,6 +17,16 @@ fun GET(url: String,
     throw Exception("Stub!")
 }
 
+/**
+ * @since extensions-lib 14
+ */
+fun GET(url: HttpUrl,
+        headers: Headers = DEFAULT_HEADERS,
+        cache: CacheControl = DEFAULT_CACHE_CONTROL): Request {
+
+    throw Exception("Stub!")
+}
+
 fun POST(url: String,
          headers: Headers = DEFAULT_HEADERS,
          body: RequestBody = DEFAULT_BODY,